CPU, or Central Processing Unit, is that part of a computer or a hosting server that performs the calculations. Every single CPU functions at a specific speed and the larger it is, the sooner everything will be processed, so in case you host resource-demanding web applications on a hosting server, for instance, an effective processor shall allow them to be performed quicker, which will significantly contribute to the whole user experience. The current generations of CPUs have two and more cores, each of them operating at a particular speed to guarantee a much better and speedier performance. This type of architecture allows the processor to control a variety of processes concurrently or several cores to manage one process if it needs extra computing power in order to be performed. Needless to say, other elements like the amount of RAM or the connection a particular hosting server uses may also affect the performance of the Internet sites hosted on it.